Heel-trimming machine.



No. 674,633. Patented May 2|, |9o|. A. McDOWELL.

HEEL TBIMMING MACHINE.

(Application Qed Oct. 22, 1898.)

2 Sheets-Sheet I.

(No Model.)

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(No Model.)

Patented May 2:, IQOI. A. McDOWELL.

HEEL TRIMMING MACHINE.

j A lication filed Oct. 22, 1898.)

' 2 Sheets-Sheet 2.

: uonms FETER5 co. PHOTO-HTML. WASHINGTON, u. c.

UNITED STATES PATENT QFFICE.

ALEXANDER MCDOWELL, OF LYNN, MASSACHUSETTS.

HEEL-TRIMMING MACHINE.

SPECIFICATION forming part of Letters Patent N 0. 674,633, dated May 21,1901.

Application filed October 22, 1898. Serial No. 694,266. (No model.)

To ttZZ whom it may concern.-

Be it known that I, ALEXANDER McDow- ELL, a citizen of the UnitedStates, residing at Lynn, in the county of Essex and State ofMassachusetts, have invented certain new and useful Improvements inHeel-Trimming Machines, of which the following is a specification,reference being had therein to the accompanying drawings.

Figure 1 of the said drawings shows in section, partly in sideelevation, certain parts of a heel-trimming machine having appliedthereto one embodiment of my invention. Fig. 2 is a view in frontelevation-that is, from the right-hand side in Fig. 1showing thetop-lift guard and the means of supporting and adjusting the same. Fig.3 is aview in section on the vertical plane which is indicated by thedotted line 3 3 in Fig. 2 looking in the direction that is indicated bythe arrows near the ends of such line. Fig. 4 is a view in verticalsection on the plane that is indicated by the dotted line 4 4 in Fig. 3looking in the direction that is indicated by the arrows near the endsof such line. Fig. 5 is a view in section on a vertical planecorresponding with that in Fig. 1, showing a modification. Fig. 6 is aview of the top-lift guard and its carrier of the modification shown inFig. 5 looking from the left-hand side in the latter figure. Fig. 7 is aview of the ring-shaped body of the top-lift guard of Figs. 5 and 6detached.

Having reference first to Figs. 1 to 4, 1 designates a fixed part of theframe of a heeltrimming machine. 2 designates a portion of thecutter-shaft, and 3 designates the cutter, 4 being a counter-guard. 5 isthe toplift guard. Heretofore in some instances the top-lift guard hasbeen mounted to fit loosely upon a portion of the cutter-shaft or upon adisk or head which is affixed to the said shaft, so as to enable thesaid guard to turn independently with reference to the cutter, wherebywhen the heel of a boot or shoe has been presented to the action of thecutter and the top lift thereof has been caused to bear against thetop-lift guard the said guard may remain stationary while the cutter andits shaft revolve. With this arrangement the great wear that takes placebetween the bearing portions of the top-lift guard and the rotating partto which it is applied soon destroys the fit between the said guard andthe said part, so that the guard becomes loose and plays or moves in amanner necessitating replacement of the worn guard by a new one. In somecases the top-lift guard has been made fast, so as to turn in unisonwith the cuttershaft and cutter; but with this arrangement variouscauses operate to occasion injury by the guard to the top lift when thelatter comes in contact with the rotating guard. My invention providesin novel and improved manner for supporting a top-lift or correspondingguard in connection with the cutter of a heel- I trimming or the likemachine, as now will be made to appear. Having reference to thedrawings, the top-lift guard 5 shown therein is annular or ring-shaped,51 being the body thereof, said body having, as customary, the beveledsurface 52 to facilitate the application of the top lift of a heel tothe usual lip 53, against which the said top lift is caused to bearduring the performance of the trimming operation. This form of guard hasbeen used heretofore, but in connection with a supporting disk or head,the latter sometimes forming a part of the cutter and rotating in unisonwith the cutter and cutter-shaft. My invention provides for supportingan annular or ring-shaped guard 5, like the one shown in the drawings,by means of devices which are independent of the cutter and its shaftand are fixed or stationary with relation thereto. The said devicescomprise, essentially, a carrier for the said ring-shaped guard, meansof holding the guard fixedly to the said carrier with capacity foradjusting the guard around its center from time to time for the purposeof presenting one portion after another of its periphery in position foruse, and a support forthe said carrier having combined therewith meansof adjustment enabling the top-lift guard to be set in the desiredposition with respect to the cutter.

The embodiment of the invention which is represented in Figs. 1 to 4 ofthe drawings contains a clamp, which is constructed to receive thetop-lift guard and hold it fixedlythat is, without capacity for freerotationthe said clamp being constructed to enable the top-lift guard tobe shifted or adjusted angularly around its center from time to time asthe position of the lip thereof, which isin position for use, becomesworn, in order to present successively fresh portions of the said lip inposition for action until the entire circuit of the lip on the guard hasbeen worn out. The form of the clamp and its carrier may be varied inpractice. Herein I have shown the carrier 6 formed or provided at 61 61with seats, against which the back of the ring-shaped guard 5 is laid,and in connection with each of thesaid seats I have shown ablockorplate,'as 62,each of the said blocks or plates being held in place byscrews 63 63. The seats 61 61 are herein shown formed on blocks or lugs64: 64, with which the carrier6 is provided, and the screws 63 63 areshown as entering holes tapped in the said blocks or lugs; but theparticular manner of forming the said seats and of their application tothe carrier or of the application of the screws, is not material. Eachplate 62 is furnished with a lip, as 621, which overlies a part of theedge of the body of the guard and is shaped properly to conform to thepart of the guard with which it engages. By the engagement of the saidlips with the edge of the guard the latter is held in place on the seatsaforesaid. The rear edge of each plate 62 in the form of such platesherein shown is furnished with a lip, as 622, entering a groove, as 623,formed in the corresponding block or lug 64, the plate thereby beingheld from displacement relatively to the said block or lug. After thering shaped guard 5 has been placed in position on its seats the plates6:2 62 are tightened up against the edges of the guard by turning thescrews 63 68. Wheneverdesired-as, for instance, after the portion of thelip 53 first in use has become badly worn-one of the plates 62 may beloosened by turning its screws in the proper direction sufficiently toenable the guard to be turned or adjusted augularly around its cen terfar enough to present a fresh portion of the said lipin position foruse, after which the plate 62, which was loosened, may be tightened upagain. In some cases one of the plates 62 may be a fixture. The form ofthe plates and the means of operating the same to clamp the guard 5 maybe varied in practice. In actual usethe guard 5 is fixed in its positionwith relation to the cutterthat is to say, it is not capable of rotatingor moving in unison with either the work or the cutter. It is, however,capable of rotary or angular adjustment from time to time until allportions of its lip 53 have been completely used up. It will be apparentthat a ring-shaped guard of the kind or kinds at present in use andwhich is an ranged to revolve during the working of the machine to whichit is applied may be taken after the inner or bearing portion thereofhas become so badly worn as to render the guard unfit for furtheremployment in the connection in which it originally was intended to beemployed and applied to holding and supporting devices embodying theprinciples of my present invention, wherewith it may be continued in useuntil after the lip 53 thereof has been completely used up around theentiie circuit of the guard.

The carrier 6 is mounted upon a support 7, the latter being applied to afixed part of the frame of the machine. Herein the said support is shownconstituted by an arm having a hole 71 therethrough, which enables thesaid arm to be passed over the cutter-shaft, the latter extendingthrough the said hole. I fit the arm upon some convenient fixture thatis concentric with the cutter-shaft. In the present case the arm isfitted upon the projecting end of the bearing-sleeve 72 for thecutter-shaft l, the said bearing-sleeve being fixed in position in theframe 1. A slit 73 is made through one end of the support 7, such slitopening into the hole 71, and the clamping-screw 74 is applied inconnection with the portions of the support which are separated by theslit. The described construction of the support provides a split socketwhich is capable of being clamped upon the bearing-sleeve 72, so as tohold the support in any desired position of angular adjustment. Therebythe support may be held either in the position in which it isrepresented in the drawings or upon manipulating properly theclamping-screw 7d the said support may be swung around the axis of thecutter-shaftthat is to say, it may be adjusted angularly with respect tothe said axis into any required position.

In order to enable the guard 5 to be adjusted with relation to thecutter, so as to permit that portion of its lip 53 which for the timebeing is brought into use to be located exactly right with respect tothe cutter at the working point in the machine, I provide means ofadjustment in connection with the carrier, permitting the carrier to beshiftedin two directions at right angles to each other in a planeextending transversely at right angles to the axis of the cutter-shaft.This means of adjustment enables the portion of the guard 5 which isintended to be brought into action to be set with exactness in propercorrespondence with the cutter. It also enables compensation to be madefor any differences which may exist in the diameters, &c., of the guardswhich it is proposed to use or for any variations in the diameter of thecuttersuch, for instance, as those which result from grinding the cutterto sharpen the same.

The adjustment of the carrier 6 transversely with respect to the support7 is effected through the aid of set or adjusting screws 8 8, which arefitted to transverse holes tapped in one of the said parts, herein thesupport, and engaging by their inner ends with a projection or-pin 82,applied to the other of such part-s, herein the carrier, the saidprojection or pin entering a hole 83 in the support, Wherebyit iscovered up and concealed. For the purpose of effecting the adjustment ofthe carrier 6 longitudinally with respect to the support the carrier isconnected with a slide 84, applied to the support. The said slide isshown formed with an end portion 85, extending at right angles acrossone end of the support 7 and fitting and movingin a recess 86 in the endof the support. To a hole made through the said end portion is applied ascrew 87, the threaded portion of which enters a hole 88, tapped intothe end of the sup-- port and extending longitudinally of the support.This screw serves to connect the slide with the support. The drawingsshow one or more grub-screws 881 881, fitted to a corresponding numberof holes which are tapped in the said end portion of the slide, the saidscrew or screws making contact by the end or ends thereof with the endsurface of the arm. By the conjoint action of these screws 87 881 theslide is adjusted to the desired point lengthwise of the support andlocked in position. The carrier 6 is connected conveniently with thesaid slide by means of a bolt 89, the stem of which passes through aslot extending lengthwise of the support, the head of the said boltholding the body of the slide against one side of the support, while thebolt afiords a convenient pivot about which the carrier may be swungunder the action of the adjusting-screws 8 and 8.

Figs. 5, 6, and 7 represent an embodiment of the invention in which thelip or flange of the top-lift guard is made in the form of a separateand detachable thin ring 56, which is secured by screws 57 57 to theface of the body 58. The said body 58 is attached by screws 59 59 to thecarrier 69. The body 58 has a complete circular series of holes 68 68for the reception of screws 59 59 tapped into its back, the said holesbeing spaced at a suitable short distance apart. This enables thetop-lift guard to be adjusted angularly around its center from time totime as wear occurs, substantially as in the case of the other embodiment of the invention.

WVhat I claim as my invention is 1. The combination with the cutter, ofthe ring-shaped guard, the stationary carrier, means to fix the saidguard in stationary position on the said carrier and adjust the guard onthe carrier around its center to bring different portions of itsperiphery successively around to the working point from time to time aswear occurs, substantially as described.

2. The combination with the cutter, of the ring-shaped guard,thestationary carrier having the holder or clamps receiving the said guardand holding it fixed or stationary and in which the guard maybe adjustedfrom time to time as wear occurs to bring different portions of itsperiphery successively around to the working point, substantially asdescribed.

3. The combination with the cutter, of the ring-shaped guard, thecarrier, means to fix the said guard on the said carrier and enable itto be adjusted on the carrier around its center to bring difierentportions of its periphery successively around to the working point fromtime to time as wear occurs, a support to which the said carrier isattached, and means to adjust the said carrier on said support in twodirections at an angle to each other in a plane at right angles to theaxis of the cutter, substantially as described.

4. The combination with the cutter, of the ring-shaped guard, thecarrier, means to fix the said guard on the said carrier and enable itto be adjusted on the carrier around its center to bring differentportions of its periphery successively around to the working point fromtime to time as wear occurs, the support, the slide on said support towhich the carrier is connected pivotally, the screws 87 and 881 by whichthe said slide and carrier are adjusted longitudinally of said support,and the screws 8, 8, by which the carrier is adjusted transversely withrespect to the support, substantially as described.

5. The combination with the cutter, of the ring-shaped guard, thecarrier, means to fix the said guard on the said carrier and enable itto be adjusted on the carrier around its center to bring dilferentportions of its periphery successively around to the working point fromtime to time as Wear occurs, the support adjustable angularly around theaxis of the said cutter, the slide on said support to which the carrieris connected pivotally, the screws 87 and 881 by which the said slideand carrier are adjusted longitudinally of said support, and the screws8, 8, by which the carrier is adjusted transversely with respect to thesupport, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

ALEXANDER MCDOWELL.

Witnesses:

GHAs. F. RANDALL, LEPINE HALL RICE.

